Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756912AbcCRTUG (ORCPT ); Fri, 18 Mar 2016 15:20:06 -0400 Received: from mail-io0-f177.google.com ([209.85.223.177]:35649 "EHLO mail-io0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751694AbcCRTUC convert rfc822-to-8bit (ORCPT ); Fri, 18 Mar 2016 15:20:02 -0400 MIME-Version: 1.0 In-Reply-To: <20160318184856.c289c591@kerio.vanmierlo.com> References: <20160318184856.c289c591@kerio.vanmierlo.com> Date: Fri, 18 Mar 2016 20:20:01 +0100 X-Google-Sender-Auth: VRVCjpFvYphohVHFxOaASW3Odb0 Message-ID: Subject: Re: [PATCH] serial-uartlite: fix build warning From: Geert Uytterhoeven To: Maarten Brock Cc: Sudip Mukherjee , Peter Korsgaard , Greg Kroah-Hartman , Jiri Slaby , "linux-kernel@vger.kernel.org" , "linux-serial@vger.kernel.org" Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2286 Lines: 49 On Fri, Mar 18, 2016 at 6:48 PM, Maarten Brock wrote: > ----- Original Message ----- > From: Geert Uytterhoeven [mailto:geert@linux-m68k.org] > To: Sudip Mukherjee [mailto:sudipm.mukherjee@gmail.com] > Cc: Peter Korsgaard [mailto:jacmet@sunsite.dk], Greg Kroah-Hartman [mailto:gregkh@linuxfoundation.org], Jiri Slaby [mailto:jslaby@suse.com], linux-kernel@vger.kernel.org [mailto:linux-kernel@vger.kernel.org], linux-serial@vger.kernel.org [mailto:linux-serial@vger.kernel.org] > Sent: Fri, 18 Mar 2016 13:48:06 +0100 > Subject: Re: [PATCH] serial-uartlite: fix build warning > >> On Thu, Mar 10, 2016 at 2:14 PM, Sudip Mukherjee >> wrote: >> > We were getting build warnings about: >> > drivers/tty/serial/uartlite.c: In function ‘ulite_request_port’: >> > drivers/tty/serial/uartlite.c:348:21: warning: assignment discards >> > 'const' qualifier from pointer target type >> > port->private_data = &uartlite_be; >> > ^ >> > drivers/tty/serial/uartlite.c:354:22: warning: assignment discards >> > 'const' qualifier from pointer target type >> > port->private_data = &uartlite_le; >> > ^ >> > >> > Fixes: 2905697a82ea ("serial-uartlite: Constify uartlite_be/uartlite_le") >> > Signed-off-by: Sudip Mukherjee >> >> Acked-by: Geert Uytterhoeven > > Reverting is not the same as fixing. > > Rant: > It is a stupid warning IMHO, but being a compiler writer myself (SDCC) I > understand how it can arise. If you assign some const pointer to a void > pointer without an explicit cast gcc does not complain about the complete > loss of type, but it does warn about losing constness. In general I'd say: > make up your mind; either warn about both or don't warn about either. You're right, I was a bit too hasty adding my Acked-by. Hereby I would like to withdraw my Acked-by. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds